Spa shell



FIG. 1 is a perspective view of a spa shell showing our design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a cross-sectional view taken along line 4—4 of FIG. 3;

FIG. 5 is a cross-sectional view taken along line 5—5 of FIG. 3;

FIG. 6 is a cross-sectional view taken along line 6—6 of FIG. 3; and,

FIG. 7 is a cross-sectional view taken along line 7—7 of FIG. 3.

The broken lines in the drawings represent unclaimed portions of the spa shell and form no part thereof. 

The ornamental design for a spa shell, as shown and described. 